Adjustable internal gauge



March 16 1926. 1,577,099

J. BATH ADJUSTABLE INTERNAL GAUGE v Filed August 5. 1923 Cil PatentedMar. l5, 19.26

Unire-n stares JOI-IN BATH, OF WORCESTER, MASSACHUSETTS.

ADJUSTALE ENTEBNAL GAUGE.

Yiippiiefition fiieii august e, 192s. serial No. 655,528.

To all 'whom t may @0n-cem.'

Be it iznown that JOHN i'irrrr, a citizen ot the United States,'residing at f'iorcester,

in the county oi ilorcester and' State of lissachusetts, have invented anew and useitul Adjustable internal Gauge, ot' which the following is aspeciication.

This invention yrelates to an adjustable gauge designed 'tor usey inmeasuring'internalv dian'ieters. In its general type ot construction,the gauge herein shown re sembles the adjustable gauge shown in theprior patent to Eath and Grey No.' 1,4762681, issued Dec. 11, 1923. i

It is the object of my present invention to improve the constructiontherein shown in many essential details, producing a gauge. which may bemore easily and economically manufactured and more convenientlyassembled, and which has been found eXf tremely reliable andsatisfactory in use.

lWith this general object in view, an importantV feature of my inventionrelates tok the provision ot an internal gauge in which j the severalparts may be very readily sepa-cV rated for cleaning, repair, orinspection, and in which they may be as easily re-assembled.

Another object ot my invention is to provide a construction inv whichthe gauge or contact bars may be easily removed from their support-ingand actuating member. l

have also provided an improved limit stop for the gauge, a novelsize'indicator, an improved construction by which a spring is adapted toprevent play or lost motion bctween certain parts ot the gauge, and vanimproved and elongated bearing surface or support for the gauge bars. Ialso disclose an attachment by which my improved gauge may be adapted toa wider range ot' uselulness.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more parties.d larly pointed outin the appended claims.

151. preferred 'form of the invention shown in the drawings in whichfFig. 1 is a side elevation et my improved gauge;

Fig. L) thereof; v

Fig. 3 is a transverse sectional view, taken along the line 3-3 inFig.2; i

Fig'. el. is a partial sectional View, looking' in the direction ot thearrow 4 in Fig, 2:

Fig. 5 is a partial longitudinal elevation,

Acaused to is a longitudinal sectional viewy broken away along the line5-5 in Fig. 1; Fig. 6 is anend elevation, looking in the direction ottheV arrow 6 in Fig. 2;

Y F 7 is a sectional elevation of certain parts showing a modiication; l

Fig., 8 is a side elevation showingthe gauge with an additional supportor attacii nientapplied thereto; i

Fig. 9 is a transverse sectional view of a modiiied form of indicating'device;

10 is a plan view ot the parts shown lin Fig. 9; and

Fig. 11 is a detail sectional view on the line 11-11 in Fig. l.

Referring to the drawings, my improved gauge comprises a casingor body10, a shaft 11 mounted for rotation only in said body and having athreaded portion 12, a

supporting member 13 threaded on the shaft 11 and having a pluraliiy ofdove-tailedin- @lined guide-ways 15 and a plurality of gauge bars Jeaiso oit dove-.tailed cross section.r Each ot. the gauge bars has itsinner tace inclined to correspond with the in: clination ot' theguide-ways 15 and the gauge bars are movable radially simultaneouslji7by endwise. movement of the supporting member 15. In these generalfeatures the gauge shown inA this application corresponds closely to thegauge shown in the Batliand Grey 1 itent.

A retaining' piate 17 is rotatably mounted on the end ot' the shaft 11and may be secured in positionthereon by a collar 18 secured to theshaft by across pin 19. 1When it is desired to separate the parts, thesupporting member 13 is iirst moved to its extreme rigl'it hand positionagainst the Vend ct the ,casing 10, as viewed in the drawings, and theshaft 11, member 13 and parts associated therewith are then removed fromthe casi-ng it); The gauge bars 16 are then 'f to the right in themember permitting the projectinc portion QG the plate 17 to enter arecess 21 vin the vlugsior projections 22 on its inner tace,

adapted to enter correspondingslots formed in the 'adjacent ends ot thegauge bars 16, Corresiliionding lugs or projectionsV 23 are formed onthe end flange 2410i the casing Such movement ot l() (Fig. o), whichin'ojectione enter eorro- Spending slots in the other ende` olI thegouge hers. lijf the cooperation ot the projections :ind E3 with theslotted rouge hors, zmruler movement. oil? the gauge hers is prt rented,while it'ree redinl nioveinent ie permitted.

In Fig. T, l lia-ive shown n. slightly moditied eimetruetion in which nretaining plete or wneher .25 is rotetehly mounted on the end ot thethreaded ehett ll" nndisretinined thereon h v :i heed 9.5.3 frownedintegr-el with the Shu'tt ll The retaining:l pinten lT or :ire proton.ily psfiwided with one or more reeessee' 2S (Figi. (t) whieh urenorniurlliy ont of line with the intuire here hut whieh een he rotntedi'or alignment t'iurowith when the gouge hui.; ure releueed Atroni thelune Vihen thi aligned, the gouge here met' he slipped endwise trom thesupportii'igl member 123 through the openings or recesses 2S, thus:rtl'ording :i ver); Convenient; means "lor sepnroting the parte.

The supijiorting member lt'l io `provided with n, projecting' redueedend portion 8h ttt'ingij within o ret-ese 31. in the end ot the ene-ingl0. The guideovuys or grooves, l5 in the Supporting: niemher extend alsothroughout the length ot the projeetion 30. (Fig. ll) thus providing nSubstantially inereesod length o'l" hearing;- 'tor the gauge i. irs,poru tieuhirl'i7 when the men'iher 13 is moved towerd the end oit thegouge or to the lett in Figs. l and 2.

The engine; l0 is also provided et its opposit e end with :in outerrecess or ehznnher 3? ond un elongated inner ehumher 3ft.. A Compressionspring is inserted in the outer recess 33 und is held therein by e eol-,hzr 8G adjustehly secured to the shaft it) hv u headless eet screw 37.The eolhir 3G also provided with :in inclined or eonieel Snr'tiiee SSpreteruhiySupplied with gradini.- tienel S9 :is indicated .in Fig. l,eti-operating: with :i zero line -l-O on the eusing to indiente relativegauge adjustment.

A second coller ell is Sometimes provided. seid coller having :iprojecting' lionne ft2 adopted to cover end eoneeol the :nijustmg screw3.7. The end et the shattll is preteriihly milled ottl to provide flutfaces, as in diented zit lf3, und the coller 4l is tori-ned with ocorrespondingly Shaped eentrzil opening; il by whieh rotation ot theCollar rele.- tiive to the shaft is prevented. A eet screw moy he needto secure the outer coller fil to the Shuft't 1l und tor furthersecurity n washer 4G :ind screw -Lt-T muy he provided. The eerew i7 movhe used to d rnw the washer lo tirnitv ugninet the end ot the eollnr lilund oleo to toree the eollur firmly against the inner eollzir 86, hetorethe screw 45 is tightened. By this menno.v end play ot the several portsniej.l he Strictly limited, :1nd the spring; 35. :toting through theSho'tt lil und the retainingl piatte l?, draws the gouge here' 1G tirmhvagainst the end tinnge 2l ot the easing' lt).

The grnduutione 23D eonnnonly indiieutie one tenthousmidth oi" zin inchezieh, so that on entire revolution ot the shntt ll and it?l ettoehedcoller 36 reijireeents :i change in gouge diameter olz ont)T n ver.vsmell frm tion ol on ineh, eonnnoniy either tire onethousnndths or oneone-huudredtih ot ou inch. '.ieeordine to the eine ot the fg-Linee. Forindicatingv lernt-n' unitn ot gouge :idjued ment, lproride u Sliding;`rod o() hitting one end eeeured in the supporting;- memher 't3 :ind:slidehle in :i remise` termed in the euesiuej llt. A eonrenieut` mennoot eef'urine' the rod o0 nud member lf3 ie iudiezi'ed iu FieA 5. inwhich the extreme end ot the rod is redueed 'in thiehnefes and extendsvinto :1n un nuler groove t'in'ined in u clamping Stud ."3l. The easingl() muy he provided with u depressed g'rndnuted portion 33. thegraduetions thereo't romper-:thug with on index line on the rod 50.1When the supporting member 13 is nioved azxioliy, the index on the rodo0 will he moved along the Seule in the easing iiortion-ii find eeehdivision ot this seele will eorreeiioml to one revolution of thegraduated eollur I-t und shutt ll.

In Figs. 9 oud Ai0 `l huve shown u Sonie what diti'erent method otinrlieotiner the lorger ehengijee in grunge diumeter. in thisconstruction. u portion ot the ,einige easing l0 is provided with oslot: (S0 elongated nxinlly of the gauge, und o shutt ll is providedwith e threaded portion Gl underlying the slot. A slide liloehr (32 ismounted in the slot G0 and :it: its inner end is Aformed o purtial nut,threaded to eiigng'e the portion Gl oit the shaft 1l. A Slotted plete G3is adjustzihly secured to the easing l0Ll h5' screws Gi und is providedwith grnduotione eo-operutingr with n zero .nirlq en the hlorfh` 62. Theedge ol the pluto (3.5i e'ttende4 into :i re Cessed eorner ot the hloek(5&3 :ind ln'events outward displacement' thereof". while permittingrfree axial movement.

Vith this eonetrnetion it will he evident that rotation oll the shaftill to more the supporting member 1.3 uxiulljv will produce eeel-responding` exi-.il moven'ient ol the bloei; G2. The parte :1re eodisposed that one revolutiim ol the Shaft 'il musee the bleek Gte movemieli;v :i distance 'enn'tly equal to one space oit the Seule G3.

I have oleo provided means hy which outer end inner limits of gaugemovement. muy he detern'iined, thus adopting;` the grunge tor go und11o-go purposes. To u this result. I provide :i Sleeve (Figs. 2 4und Jr)rotntnhle on the shut't 'll und litting within the inner recess 5M. Thesleeve Tt) muy he secured in any desired angular position on the shafthy menne ot `a headless Set Seoure lift) screw 7l which may be tightenedor loosened byr inserting a small screw-driver through an opening 7 2 inthe casing, especially provided for this purpose. The sleeve 70 has acircumferential slot 7S of anyfdesired length and a stud 74 is threadedin thefcasing l() with its reduced inner end adapted to enter the slot73. lV hen thus positioned, the stud 74tthus limits angular movement ofthe shaft l1 to the lost motion in the 'slot 73 and thus provides upperand lower limits of gauge adjustment. The difference in diameter betweenthese limits will ybev determined by the circuii'iferential lengthprovided in the slot 7 3.

The straight cylindrical portion 7 5 (Fig. S) of my gauge casing lO iswell adapted' to support auxiliary devices for different purposes, onesuch device 76 being indicated as secured to the gauge' by a clampingplate 77 and screws 7 8. vided with a split bearing 7 9 for a rod 80,which may be firmly secured in a desired position by a clamping screw81.Y My internal gauge is thus'readily adapted for externally gaugingduplicate pieces of work Vif, it being merely necessary to turn thegauge to a zero reading and to then adjust the' rod 8O with a standardpiece XV between the `endof the rod and the adjacent gauge bar 16.Thereafter the graduations 39 of the gauge will give a relativeindication of the variations between different pieces W inserted betweenthe gauge bar and the rod 8,0, If actual differences in'sizeV aredesired,

it will he necessary to divide the reading ofl the scale by two, as thescale indicates the combined movements of .two gauge bars, while withthe attachment, the movement of a single'lbar only is significant. Ifdesired for external measurements only, all butone.

of the gauge bars may obviously beremoved or omitted.l The attachmentshown illustrates only a single one of themany analogous purposes towhich my improved gauge is readily adapted.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed otherwise than assetforth in the claims, but what l claim is l j* j l. An adjustableinternal gauge comprising a casino', a shaft rotatable only in lsaidcasing and having a Vthreaded portion, a supporting member threaded konsaid shaft and axially movable thereby, said lmember having a pluralityvof guide-ways therein eac-h having face inclined longitudinally vtowardthe axis of the shaft, a plurality of gauge bars each having an inclinedinner face adapted to contact with one of said first mentioned inclinedfaces and each Islidable in one of said guide-ways, aretaining platerotatably mountedon an end of said shaft and engaging the ends of saidbars,

This device 7 6 is profirst mentioned inclined faces and each slidablein one of said guide-ways, a retaining plate rotatably mounted on an endof said shaft and engaging the ends of said bars, anda spring acting onsaid shaft and casing and effective to draw 'said plate against 'saidgauge bars and said gauge bars against the end of said casing. Y

3. An adjustable internal gauge comprising acasing, a shaft rotatableonly in said casing and having a threaded portion, a supporting memberthreaded on said shaft and axially movable thereby, said member having'a plurality of guide-i'vays therein each having a face inclinedlongitudinally toward the axis of the shaft, a plurality of gauge' barseach having an inclined inner faceY adapted to contact with one of saidfirst mentioned inclined faces and each slidable in one ofsaidguide-ways, and a retaining plate rotatably mounted on an end of saidshaft and engaging the ends of said bars, said retaining plate havingmeans for nonrotatable engagement with said gauge bars and havingrecesses vadapt-ed for alignment with said gauge bars to permit endwiseremoval thereof from said supporting member.

4;. An adjustable internal gauge comprising a casing, a shaft rotatableonly in said casing and having'a threaded portion, a supporting memberthreaded on said shaft and axially movable thereby, said member having aplurality kof guide-ways therein each. having a face inclinedlongitudinally toward the axis vof the shaft, and a plurality of gaugebars each having an 'inclined-inner face adapted' to Contact with one ofsaid first mentioned inclined faces and each slidable in one of saidguidevays, aid'casing having an end recess therein and said supportingmember having an end portion adapted to enter said recess and saidguideways being extended in said end portion of said member to provideincreased bearing surface for said bars. j

5. An adjustable internal gauge comprising a casing, a shaft rotatableonly in said casing and having a threaded portion, a supporting memberthreaded on said shaft and axially movable thereby, said member having aplurality of guide-ways therein each having a faceinc-lined'longitudinally toward lll the axis ol" the allait. a pluralityoif gauge bare each having; an inclined inner face adapted to tontactwith one of said first mentioned inclined .faces and each slidable inenc of said njiiiileava'iys, a retainingr plate rotatablv mounted on anend ot said shaft and engaging' the ends oi said bars, `said canina'harina a reccesi a spring in said rect. ssarrcrundumsaid shalt, and acollar scoured to said allait and engaged by said eprint'. said springacting through `said collar, rha'lt and plate to draw said bars ilirmlyae'ainat the end of said casing.

l'. )in aljustalile internal gauge as set l'orlh in claim in which asecondcollar is eecurcd to .fiziid rha'll in positifm to cover theeetui-ine; means lor the lirst collar and topruteri the same 'fromaccidental displacrnient.

T. An adjustable internal gauge as set :iorth in claim 5 in which asecond. collar non-rotatabljif' mounted on the end oi said shalt in peion to cover and protect thesecuring' means for `said first collar andin which means is provided for drawing; said tze/foral, collar lirmlyagainat said lirst. collar.

tw. An adjustable internal gauge as iorth in claim 5 in `which a secondcollar is Secured to said shatt in position to cover the securing mainsfor the tiret collar and to protect the same from accidentaldiaplaeement, said lirst collar having; a `substantially conical outerportion provided with graduations 3o-operatine` with an index on saidcasina' to indicate relative frange adjustment.

il. in adjustable internal gauge eompria ingr a recessed casing, ashaftrotatalfile onlyl inlsaid casingl and having, a threaded portion asupporting member threaded on said shaft and axially movable thereby,said ineinl'ier ha\ing;` n plurality ot' guide-Ways therein each havingTa tace inclined longitudinally toward the axis of the shaft` a pluralityol' grange bars each having an inclined inner 'tace adapted to contactwith one oli aaid lirst mentimied inclined .faces and each slidable inone of aaidguide-ways, a alerro secured to sa id Shaft Within the reeensin said casingl and having a cireun1- `llerential slot, and a stud insaid easing exlending' into said slot and thereby limiting` angularmovement ot said shaft when thus inserted lll. An adjustable internalgauge cinnpris- 'me' a caaing, a sha'lt rotatable only in said eas'inland having a threaded portion, a supportingl member threaded on saidshaft and axially movable thereliy, said member having a plurality oiguide-Ways therein each having' a face inclined longitudinally towardvthe axis. oit the shaft, a plurality of' ,gauge bars each having aninclined inner ilace adapted to contact with one ot said trst mentionedinclined 'faces and each slidable in one of said guide-Ways, and an inmancata heating device directly engaged by said sha'lt and movableaxially et said gauge by rotation et said shaft, to indicate relativegauge adjustment. A

ll. An adjustable internal gauge comprisy ing; a` `easing, a shaftrotatable only in said "aeing and havina` a threaded portion,asupporting member threaded on said shalt and axially `movable thereby,said member having a plurality of gniicle\vays therein each having a:tace inclined longitudinally to- Yard the axle of the shaft, aplurality oil grange bars each having1 an inclined inner tace adapted tocontact with one of said first mentioned inclined faces and eachslidable in one ot said guide-Ways, and a device directly engaged bysaid shal't and movable axially ot said gauge by rotation of said shaft,said device and said casing having eoop erating indications etl'ectivevto indicate rel alive grange adjustment. A

l2. An adjustable internal gauge comprising` a casing, a shattrotatableonly in said casing and having;` a threaded portion, a` suppra-timeImember threaded on said shalt and axially movable thereby, said`member-havina a pluralit)v oi' nuideavays therein each having;y a taceinclinedlongitudinally toward the axis of the shaft, a` plurality ofgauge hars cach having an inclined inner 'tace adapted to contact withone of said first mentioned inclined faces and eaelrsliclable in one oitsaid guide-Ways, said casing having a slot and said shaft having,- athreaded portion underlying' said slot, a partial nut sflidable in saidslot and engaged by said threaded shaft portion, and `means to cure saidnut in position and to indicate its longitudinal position in saidslot,thereby iudieating relative gauge adjustment.

12:3. `An adjustable internal gauge comprisina` a easing-` a shaftrotatable only in said asing and having a threaded portion, asupporting' member threaded on said shaft and axially movable thereby,said member havingl al plurzlity ot guide-nnys therein each having' a'tace inclined longitudinally toward `the axia of the shaft, a pluralityoli range bars each having an inclined inner `face adapted to Contactwith one of said. lirst mentioned inclined faces and each slidable inone oi? said guide-Ways, said casing ha ving` aslot and said sha 'tt having' a threaded portion underlyingl eaid slot, a partial nut slidablein said slot and engaged bysaid threaded shaft portion, said nut havingla zero line on its outer tace, a `graduated plate overlying' a portionol said nut to prevent displacement thereof, and cooperating With saidzero lineto indicate relative gauge adjustment, and means to secure saidplate to said caeing and to permitlongitudinal adjustment thereoli.

i ll. An adjustable gauge comprising a casing, a lshaft rotatable onlyin saidcasing, a

llt)

mentioned inclined face and slidalole in saidl guide-Way, an additionalcontact member, and means to secure said member in relatively fixedposition 'on said casing i'orv cooperation with said gauge bar inmeasuring external dimensions.

15. An adjustable gauge comprising a casing', a shaft rotatable only insaid easing, a supporting member threaded on said shaft and axiallymovable thereby, said member havinga guide-Way therein having a faceinclined longitudinally toward the axis of the gauge, a gauge bar havingan inclined inner face adapted to Contact with said firstmentionedinclined face and slidable in said guide-Way, a device adjustablysecured on said casing and projecting at one side thereof, a contactrod, and means to adjustably secure a contact rod therein, positioned to(to-operate with said gauge bar to measure external dimensions.

In testimony whereof I have -hereunto at xed my signature.

JOHN BATH.

